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The Trials of the Battleship “North Dakota”

Present Conditions on the Panama Canal




A Gasoline Engine for Corn Husking

By Frank C. Perkins

Salvage of the United States Cruiser “Yankee” by Compressed Air

The Gyroscopic Mono-Railroad

Controlling Steamship Engines from the Bridge

Sounding the Ocean of Air Above Us

Atmospheric Exploration

A Self-Acting Mail Elevator

Handy Man's Workshop

Porosity of Liquids

By A. R. Van Der Veer

Scissors with a Saw-Tooth

By W. J. C.

How to Wind an Open Spring

By Otto Kerner

Plating Spoons and Forks at Home

By A. J. Jarman

Blue Roses

By Gustave Michaud

Device for Drawing Ovoids

By J. O. Brouillet

Home-Made Knob and Tube Boring Machine

By R. H. Brockmann

Device for Washing Prints

By K. Parkhurst and W.

Inexpensive Apparatus for Illustrating the “Hydrostatic Paradox”

By F. R. Gorton

The Self-Smoking Pipe


  • Departments


  • Notes and Queries

  • Recently Patented Inventions

  • New Books, Etc.

  • Patents

  • Index of Inventions

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